231957432 has 80 divisors (see below), whose sum is σ = 742523760. Its totient is φ = 66272256.

The previous prime is 231957431. The next prime is 231957433. The reversal of 231957432 is 234759132.

It is an interprime number because it is at equal distance from previous prime (231957431) and next prime (231957433).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231957431) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 21033 + ... + 30104.

It is an arithmetic number, because the mean of its divisors is an integer number (9281547).

Almost surely, 2^231957432 is an apocalyptic number.

It is an amenable number.

231957432 is an abundant number, since it is smaller than the sum of its proper divisors (510566328).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

231957432 is a wasteful number, since it uses less digits than its factorization.

231957432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51162 (or 51149 counting only the distinct ones).

The product of its digits is 45360, while the sum is 36.

The square root of 231957432 is about 15230.1487845654. The cubic root of 231957432 is about 614.4257816940.

The spelling of 231957432 in words is "two hundred thirty-one million, nine hundred fifty-seven thousand, four hundred thirty-two".